Download Below-ground interactions in tropical agroecosystems: by Meine van Noordwijk, Georg Cadisch, Chin K Ong PDF

By Meine van Noordwijk, Georg Cadisch, Chin K Ong

This ebook offers a synthesis of plant-soil-plant interactions from the plot to panorama scale. It specializes in the method point, that is suitable to many varieties of multispecies agroecosystems (agroforestry, intercropping and others). It additionally hyperlinks uncomplicated study to useful program (and indigenous wisdom) in quite a lot of platforms without or with bushes, and considers implications of below-ground interactions for the surroundings and international switch matters. The contents contain root structure and dynamics, plant-soil biota interactions, soil biodiversity and meals webs, water and nutrient biking, and the required linkage to modelling ways. to be had In Print

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Extra info for Below-ground interactions in tropical agroecosystems: concepts and models with multiple plant components

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Farmers associate the faster heating of tanah panas soils with their higher sand content. These soils are also known to be highly porous, and consequently to suffer more pronounced nutrient leaching. Tanah dingin soils, on the other hand, contain more organic matter and less sand: they remain relatively cool and are considered better soils for plant growth. Andean farmers also use fria (‘cold’) and caliente (‘hot’) to classify soils of different fertility; this classification corresponds (though not directly) to measured subsoil nutrient and soil humus content (van der Ploeg, 1989).

1, such local ecological knowledge comprises both directly and indirectly acquired knowledge. Typically, it is the locally derived elements that differ from scientific knowledge in their level of aggregation (grouping according to perceived pertinence). Whereas science has emphasized reductive analysis, farmers tend to think more holistically, with limits imposed on their analysis by what they are able to observe and experience. This creates regularities in local knowledge of natural processes across cultures, as well as regularities in terms of how local knowledge contrasts with scientific understanding.

In one location (Palpa), farmers were also concerned about the speed at which crop residues left on their bari land decomposed. For example, wheat roots were considered to be very tough, taking up to a year to fully decompose and making soil rukho (‘infertile’) in the process. When left in the field after the harvest, these roots were thought to absorb water and make soil ovano (‘dry’), which affects the growth of the subsequent crop. To cope with this, farmers have changed their harvesting practice.

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